ELECTROMAGNETIC SHIELD STRUCTURE IN SHIELD COMPARTMENT PENETRATION WAVEGUIDE, CABLE CONSTRUCTION METHOD FOR SHIELD COMPARTMENT PENETRATION WAVEGUIDE

PROBLEM TO BE SOLVED: To easily perform installation of a waveguide in a shield compartment and insertion of a cable into the waveguide and to surely provide a required shield performance.SOLUTION: An electromagnetic shield structure comprises: a waveguide 13 which penetrates a compartment body 11 in a shield compartment 10 having electromagnetic shieldability and is formed from a conductive material; a plurality of plate bodies 21 laminated within the waveguide 13 and including a plurality of recessed grooves 22 continued in an axial direction of the waveguide 13, each of the plate bodies being formed from a conductive material; and cylindrical parts 30A and 30B which are formed from the recessed groove 22 that is formed in the lower plate body 21, and the upper plate body 21 between the plate bodies 21 positioned vertically to each other inside of the waveguide 13, and of which the inner shape dimension is made equal to or smaller than a 1/2 wavelength of a radio wave in an upper limit frequency of a shield object.SELECTED DRAWING: Figure 2 【課題】シールド区画への導波管の設置、導波管内へのケーブルの挿通を容易に行うことができ、かつ所要のシールド性能を確実に得る。【解決手段】電磁シールド性を有したシールド区画１０の区画体１１を貫通し、導電性材料から形成された導波管１３と、導電性材料から形成されて導波管１３内に複数枚が積層され、それぞれ導波管１３の軸線方向に連続する複数の凹溝２２を有した板体２１と、導波管１３内で互いに上下に位置する板体２１同士において、下方の板体２１に形成された凹溝２２と上方の板体２１とによって形成され、内形寸法がシールド対象の上限周波数における電波の波長の１／２以下とされた筒状部３０Ａ，３０Ｂと、を備える。【選択図】図２